here we go more questions i would like to build a top for my lil boat but as always i want different im thinkin a t top would look great daughter has a industrial grade sewing machine/fatherinlaw is a welder/im kinda crafty myself but befor i start i need 2 questions answered would like to design it to where canvas is removable at any given time therefor i thought of using these snap buttons type ummm fergot what they are called. thinking i could remove instantly question is if top is on would it hold while moving or would it the wind unsnap it, my boat is a 15 ft er with a 40 hp motor assuming it will do about 40 mph maybe??? 2nd question assuming 40 mph is correct would 1/2 in tubing be stiff enough to build frame or do i need to go to 1 " pipe thanks folks